Brake for tramway and railway vehicles.



91 3 ,825, Patented Mar. 2, 1909.

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UNITE SATES PATENT @FFTC.

EDWIN JONES, OF PADESWOOD, NEAR MOLD, ENG-LAND, ASSIGNOR OF ONE-HALF TOJOHN ARTHUR STUART, OF PRESTATYN, ENGLAND.

BRAKE FOR TRAMWAY AND RAILWAY VEHICLES.

To all whom it may concern:

Be it known that I, EDWIN Jones, a subject of Great Britain, residing atStation House, Padeswood, near Mold, in the county of Flint, WVales,have invented new and useful- Improvements in and Connected with Brakesfor Tramway and Railway Vehicles, of which the following is aspecification.

This invention has reference to brakes, for use in connection withtramway and railway vehicles, and has for its object to provide a brakeblock or shoe and holder, which are simple in construction and eflicientin use.

According to my invention, the back of a brake block or shoe of the typecommonly employed is rovided at or about the ends with recesse oroverhanging projections or lugs, and at the middle a pro ection or lug,which is wider at its extremity than at its n baseis also provided.

The face of the holder is provided with a cavity or recess similar incontour to that of the middle lug or projection referred to, and theends or extremities of said holder are so formed as to be adapted toenter the recesses of the upper and lower lugs or projections referredto. The upper and lower lugs or projections on the block or shoe areslotted, and a hole or passage is provided in the middle lug; the faceof the holder is also suitably slotted; and when the block or shoe andholder are assembled they are temporarily pinned together by means of asuitable key or cotter.

The brake block or shoe is placed in position, in dovetail fashion fromeither side of the holder, and is removable from either side.

The function of the key or cotter referred to is only to prevent lateraldisplacement of the brake block or shoe in relation to the holder, asthe interiitting or dovetailed attachment of the shoe with the holderprevents vertical displacement. By removing said key or cotter the brakeblock may be readily withdrawn from either side of the holder, and assaid block is neither right nor left, if, in use, the blocks or shoes ofa vehicle should wear unequally, they may be @eadily interchanged withtheir holders.

so Further, due to the manner in which the block or shoe is attached tothe holder, should a portion of a block or shoe break when in use, theremaining part is maintained in position in the holder, and will notfall therefrom.

Specification of Letters Patent.

Application filed March 28, 1908.

Patented March 2, 1909.

Serial No. 422,847.

A drawing illustrating my invention is annexed hereto, in which Figure 1represents, in side elevation, the brake block and holder assembled.Fig. 2 is a view of the back of the block, and Fig. 3 is a plan view ofsame. Fig. 4; is a plan; and Fig. 5 is a view of the engaging face ofthe holder. Fig. 6 is a detached view of the key or cotter.

(1 represents generally the brake block, and l) the holder.

0 are the upper and lower recessed or over hanging projections disposedat the back of block a.

(Z is the projection or lug at the middle of block a, this being widerat its extremity than at its base, and e is the cavity in the holder 1)which is similar in contour to that of said lug d. When the block isplaced in engagement with the holder, the ends or recesses b of holderenter the recesses c of projections c.

f indicates the slot dividing lugs c, and g is the hole provided in lugh is the slotted portion of the holder, to permit passage of the key.

71 is the key or cotter, which, when the brake block and holder areassembled, is passed through slots 1 and h, and hole g, to preventlateral displacement of the brake block in relation to the holder.

It will be obvious that holders of various types may be formed orprovided with a block engaging face according to this invention.

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent is 1. In brakes for tramway and railwayvehicles, an interchangeable brake block and holder comprising incombination a brake block having a lug in the middle, overhanging lugsor projections at or about the extremities; a holder, a recess in saidholder adapted to receive said middle lug, and ends adapted to fit intothe recessed portions of the upper and lower lugs of the block and a keyadapted to prevent lateral displacement of the block relative to theholder.

2. In brakes for tramway and railway vehicles, an interchangeable brakeblock and holder comprising a brake block having a lug in the middlewhich is wider (in side view) at its end than at its base, overhanginglugs at the extremities; a holder provided with a recess adapted toreceive said middle name to this specification in the presence of lugand ends adapted to fit into the recessed two subscribing witnesses.

portions of said upper and lower lugs of the F T T block; and a keyadapted to pass between JOKES 5 said upper and lower overhanging lugsand Witnesses:

JOHN HUDLEY WALKER,

through said middle lug.

In testimony whereof I have signed my EMILY BURNETT.

